Jackson, 30, was a popular team leader who played nearly every snap last season and led the Browns in tackles. He signed a five-year extension worth $42.5 million two years ago and said in late December he'd be "absolutely" shocked if he didn't return in 2014.

Much has changed in the Browns' world since the end of last season, however. New coach Mike Pettine praised Jackson at the NFL Scouting Combine but made no promises about his future.

This was purely a football decision by the Browns, who have plenty of cap room and could've easily carried Jackson's salary on the books. Pro Football Focus ranked the 2006 second-round draft pick the 13th-best inside linebacker in football during the 2011 season. He dipped to 41st overall in 2012 and 42nd in 2013.

The move leaves Cleveland very thin at inside linebacker. You can safely assume the position will be a major priority in the coming months. Jackson has plenty of respect around league circles and should find work in relatively short order.